Title :
Experimental study of the combined mode and polarization control in VCSELs with a sub-wavelength surface grating
Author :
Haglund, Å ; Gustavsson, J.S. ; Jedrasik, P. ; Larsson, A.
Author_Institution :
Dept. of Microtechnol. & Nanosci., Chalmers Univ. of Technol., Goteborg, Sweden
Abstract :
This study investigates the combined mode- and polarization-control in 850-nm oxide-confined VCSELs having a locally etched sub-wavelength surface grating with different geometries. A high polarization stable single-mode output power and low threshold current can be achieved for a wide range of duty cycles, which facilitates the fabrication. Moreover, no degradation of the far-field is observed for the ensemble of investigated devices.
Keywords :
diffraction gratings; etching; laser cavity resonators; laser modes; light polarisation; optical variables control; quantum well lasers; surface emitting lasers; VCSEL; combined mode control; far-field degradation; locally etched surface grating; oxide confinement; polarization control; polarization stability; quantum well laser; single-mode output power; subwavelength surface grating; Apertures; Etching; Gratings; Mirrors; Optical fiber polarization; Optical polarization; Optical surface waves; Power generation; Surface resistance; Vertical cavity surface emitting lasers;
Conference_Titel :
Lasers and Electro-Optics Society, 2005. LEOS 2005. The 18th Annual Meeting of the IEEE
Print_ISBN :
0-7803-9217-5
DOI :
10.1109/LEOS.2005.1548078
